【题目】They are ______ homework carefully. ( )
A.doB.didC.doing
【答案】C
【解析】
句意：他们正在仔细地做作业。正在做某事，现在进行时态，谓语动词be doing结构，故选C。
查询谷 - www.chaxungu.com
最新文章
- 2026-04-11-What your sister yesterday morning? ( )-She went cycling.A.did; doB.does; doC.does; did
- 2026-04-11They are homework carefully. ( )A.doB.didC.doing
- 2026-04-11First, Li Lei was a worker. (后来) he became a pilot.
- 2026-04-11She said to (她自己) study hard.
- 2026-04-11The (世界) is very big.
- 2026-04-11Uncle Li is a (模范) for all of us.
- 2026-04-11Helen Keller could speak and write. (改为否定句)
- 2026-04-11Yang Liwei is famous in China. (改为一般疑问句)