【题目】It is raining so hard.I think Tom is_______to come to our party.
A.impossible
B.possible
C.unlikely
D.uncertain

【答案】C
【解析】考查单词辨析。impossible和possible都不能用“人”作主语,只能用it作形式主语,但likely则不同.既可说sb．be likely to do sth．,也可说It be likely that…。故选C。