Câu hỏi 16: I went to the library, but I didn’t find the book ________ . A: that I needed it B:I needed it C:I needed D: of which I needed Câu hỏi 17: We postponed the pinic _________. A: because it was heavy raining B: because it is was raining heavily C: because it was raining heavy D: because of the heavily rain Câu hỏi 18: My shoes are dirty. I’d better ________ them off before I come in. A:push B:take C:put D:get Câu hỏi 19: ___________ we miss the last bus, we will have to walk home. A:if B:when C:as D: unless Câu hỏi 20: _______ air is one of the many problems we have to solve. A: polluted B: pleasant C:pure D:fresh Câu hỏi 21: Because plastic bags are very hard _________, they will cause pollution. A: wrap B: dissolve C:tear D: collect Câu hỏi 22: We leave early ________ miss the last bus. A:so as not B:in order not C:in order to D: in order not to Câu hỏi 23: Easter happens ________ around the same time as Passover. A: in B:at C:on D:by Câu hỏi 24: If you go _____ doing that and you’ll end ______ in serious trouble. A:off-with B:on-up C:out-up D:up-with Câu hỏi 25: We played very well. __________, we lost the match. A: moreover B:so C: therefore D: however