题目内容
3．We'll plant trees tomorrow，and I don't know Tom will come and join us．（ ）| A． | if | B． | which | C． | what | D． | where |
分析 明天我们要去植树，我不知道Tom是否会来加入我们．
解答 答案：A
根据语境以及上下文，本题考查的是连词的用法． 根据语境结合主句 I don't know推测句意是"明天我们要去栽树，我不知道Tom是否会来加入我们．"，由此判断本句表达的是说话人想知道Tom是否会来，所以应该用if"是否"，故选A
点评 比较和分析选项中连词的不同含义及其用法是解答该题的关键；还要根据句中信息正确推测该句句意，进而作出解答．
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