21. Population expansion seems to surpass the ability of the earth to meet _____________ food. A. the requirement of B. the command of C. the demand for D. the necessity for 22. I’m sad to think that all my plants __________ by the time I ____________ from holiday. A. will die – return B. died – returned C. may have died – have returned D. had died – could return 23. We encountered particularly ____________ opposition in the second round of the tournament. A. stiff B. iron C. rigid D. hard 24. Before the meeting, they needed to disseminate information relevant to all non-principals via the non-principal newsletter. What is the opposite meaning with the underlined word? A. incompatible B. appropriate C. consistent D. inconspicuous 25. There is a rumour __________ circulation that the director had a big argument ___________ the manager at the last meeting. A. on – about B. around – to C. within – towards D. in - with 26. Well, it’s 7 pm. I’d better hit the ____________ if I want to get home before it’s dark. A. roof B. headline C. newspaper D. road 27. “How have you been recently?” – “_________________________” A. It’s too late now B. Pretty busy, I think C. By bus, I think D. No, I’ll not be busy 28. David ___________ his grandmother’s phone number with his friend’s, which later led to some embarrassment for him. A. rang in B. played out C. mixed up D. called off 29. Unsalted butter is best for this recipe, but ____________ that, margarine will do. A. except B. failing C. for all of D. given 30. Don’t tell me I ____________ till 5 o’clock in the afternoon. A. was to make them to stay B. must have made them stay C. could have made them stay D. was to made them stay