单项选择题
It is very likely that the Martian will also be ______ to underground existence, for conditions are much more equable underground.
单项选择题 We tried to settle the problem with them as soon as possible, but they seemed to ______ sincerity.
单项选择题 Why don't you take ______ to read on the train Can you lend me ______ interesting
单项选择题 That ______ the case, we have to make some changes in our plan.
