未知题型
When I try to understand ________ 选择
A,it is that构成强调结构，除去后句子仍然应该成立
未知题型 Having decided to rent a flat, we __________ 选择
未知题型 You have nothing to __________怎选择
未知题型 The conference _________ a full week by the time it ends.A) must have lasted ) will have lasted C) would last D) has lasted
