【正文】
must were able to should be immediately Fill in the blanks with the words given in their proper forms : weather in London is ____________.( change) 2. Please wait for me at the main _______ to the museum. ( enter ) 3. Air is ___________. ( visible ) 4. The scientists found some mummies _______ under the pyramids . ( bury ) 5. Can you ________ it to me again ? I can’t understand it. ( explanation ) 6. I don’t feel like _________ football in the street .(play) 7. I prefer this kind of cloth. It feels ________. ( smoothly) 8. A: He must be in the office . B: He _______be there . I saw him talking to his friend in the classroom just now . ( can , may , must ) changeable entrance invisible buried explain playing smooth can’t 9. The rain stopped us from _________ to school .(go) 10. When he came into the office, he found his staff busy _____ . ( work ) 11. Don’t ______ out of the window . It’s dangerous .(lean) 12. These wires are ______ to the cables buried under the ground. (connection) 13. That’s not a bad ____________. ( explain) 14. Electricity es from a _________ station. (powerful) 15. Long ago , when people died , they are usually _____. (bury) 16. Don’t touch the wire .You will get an ________ shock .( electricity) 17. Tom is an _____ boy . He never feels tired .(energy) was an _____ repairing the electric appliance . (electricity) going working lean connected explanation power buried electrical energetic electrician keep their desks be polite dress stand lean out of read ics sleep 1,2,3,4, 5,6,7,8