We’ll plant trees tomorrow, and I don’t know        Tom will come and join us.

A. if                B. which              C. what                 D. where

We’ll plant trees tomorrow, and I don’t know_____ Tom will come and join us.

   A. if          B. which          C. what        D. where

根据句意及括号内的汉语提示完成句子。（每空一词）
【小题1】 If the weather is ____________（晴朗的）, we’ll plant trees along Xihe River.
【小题2】 We’ll make a _____________ (决定) to have a meeting in memory of（纪念） “5.12 Earthquake” at school next month.
【小题3】Thanks to the policy, the government is sending home-electric machines to farmers, they can pay much ___________ (少的) money.
【小题4】 My son is looking forward to ____________ (收到) letters from his pen pal in England.
【小题5】 The busier you are, the ______________（幸福的）you’ll feel.
【小题6】I’m waiting for my friend. If she ____________ (返回), I’ll go shopping with her in Huangshang Supermarket.