—____________ are they doing? ( ) —They are watching TV.
句意：他们正在做什么？他们在看电视。问什么用 what。对应 B。A 什么时候，C 哪个，均不符合语境。故选 B。
2018年12月，张阿姨把4000元的存入银行，定期三年，年利率是2.75%到期后，应得利息______元.
—____________ are they doing? ( ) —They are watching TV.
She _____________ very short. ( )
—Can you come with me? ( ) —Yes, I ____________.
There ________ some children in the classroom. ( )
Let’s go . ( )
Kitty comes to school _____________ bike. ( )
On the bus, we ____________ give the seat to old people. ( )
Thank you _______ your help. ( )
选出不同类别的单词。
