【正文】 happily.A．to prevent, to live B．to prevent, from livingC．to preventing, to live D．to preventing, from living54．— It is kind the doctors to devote all the time he had to for the patients. — I think so, they are so great.A．for, care B．of, care C．of, caring D．for caring55．— You don’t know what great difficulty I had ________ the two tickets.— But the film is really worth ________ twice.A．getting。 to see52．He made up his mind to devote his life________ pollution ________happily.A．to prevent。 calling47．The girl is so helpful that she devoted all her spare time she had ________ others.A．to helping B．helping C．to help D．helped48．—Is there anything amazing in today’s newspaper?—Yes. By using ordinary puters, NASA scientists are busy________ at home to control a space rover(天體登陸車）on the Red Planet. .A．to programme B．programming C．programme D．with programming49．Huawei has succeeded in ________new software for his products. I can’t wait ________a new Huawei mobile.A．developing, to buy B．developed, buying C．developing, buy D．develop, buying50．—Excuse me, can you explain the reason to me again?—Sorry, I know what I want to say but I have difficulty ______ myself clearly.A．express B．to express C．expressing D．to be expressed51．—You don’t know what great difficulty I had ________ to get the two tickets.—But the film is really worth _________ twice.A．managing。 to give up45．People are advised to avoid ________ their eyes, nose, and mouth with unwashed hands.A．touch B．touched C．to touch D．touching46．On her way home, Lucy saw a thief ______ in a shop. She stopped ______ 110 at once.A．steal。 didn’t use to44．People who run towards their dreams prefer _______ the failure rather than _______ their dream.A．experiencing。 collecting39．Children are not born with their habits already _______.A．to make B．to be made C．making D．made40．The rubbish ________ every day is being a serious problem in cities around the world.A．produce B．produced C．producer D．producing41．If you want to make yourself ______, you should speak clearly and slowly.A．to understand B．understood C．understand D．understanding42．The film _______ reallife events ________ by Li An. It’s moving.A．based upon, directed B．based upon, was directedC．was based upon, directed D．was based upon, was directed43．The Smiths are considering ________ to England because they ________ the cold weather there.A．not moving。 happy38．The list _________ 19 trillion data _________ over nine years from 390 cities across 48 countries.A．based on。s impolite to keep someone________ for a long time.A．wait B．to wait C．waiting D．have waited35．Snakes don’t have ears but they can feel things ________.A．moving B．move C．moved D．to move36．When Tom saw his mother ______ for him on a cold winter night, he couldn’t keep back his tears.A．wait B．waited C．to wait D．waiting37．—How do you feel about people who keep you ____?—They drive me ____.A．wait。 didn39。 aren39。 interest C．do。 how C．whether。 to work C．to stay。 to work B．staying。 how B．why。 interested in B．to do。t allow us _____ in the river alone.A．swimB．to swimC．swimmingD．swam21．— There are so many kinds of Mp5 in the shop. We can’t decide _________. — What about this pink one?A．what to buy B．to buy what C．which to buy D．to buy which22．—To keep the students safe on their way to school, we have taken more action.— That sounds great. We should do what we can __________ the school bus accident.A．to prevent B．prevent C．to preventing D．preventing23．During the Spring Festival, we Chinese people ___ door gods on gates, but now few families do so.A．used to put up B．used to put inC．were used to put up D．were used to putting in24．When his name was called, I saw him ________ from his seat.A．rose B．rising C．to rise D．rise25．—There is something wrong with your bike,isn’t there?—Yes. I’ll have it tomorrow.A．repair B．repairingC．repaired D．to repair26．I like watching people _____in the street.A．walking B．walke