【正文】
better go to see a doctor. Don39。t forget ________ your mask. (口罩)A. putting on B. wearing C. to put on D. to wear41. Based on Li Wenliang39。s professional knowledge of SARS, he warned his friends _______ themselves against the novel coronavirus.A. protect B. to protect C. protecting D. protected42. The soft music makes me ________.A. felt sleeping B. feel sleep C. feel sleepy D. sleeping43. —What should I do, doctor?—________ healthy, you should take more exercise.A. Keep B. Keeping C. To keep D. Kept44. —Your robot has caught a virus and it no longer works properly. —OMG! ____________mess it has made! I really don39。t know ____________to do with it.A. How。 what B. What。 how C. What a。 what45. We find very necessary to protect the wild land full of all kinds of plants.A. it B. this C. that D. /46. Paul made a nice cage _______the little sick bird till it could fly. A. keep B. kept C. keeping D. to keep47. It’s interesting___ other people___their talents.A. to watch,to show B. watch,to show C. to watch,show D. watch,show48. __________ a bridge to the Tanzanian students in primary and secondary schools, the Tanzanian Chinese Culture Center held some lasting activities at schools.A. Build B. To build C. Building D. Built49. There are no ways she can e up ________ herself out.A. with to help B. to help C. with helping D. to helping5