Sheldon could have defeated Howard in the match, but he _______ too careless at the last minute.
| A．is | B．was | C．has been | D．had been |
Chen Yang has brains．In fact，I doubt whether anyone in the class hasIQ.
| A．a high | B．a higher | C．the higher | D．the highest |
I don’t think David could have done such a stupid thing last night, ?
| A．did he | B．didn’t he | C．do I | D．don’t I |
Playing QQ’s “Happy Farm” by planting, watering, fertilizing, spraying, harvesting and selling of virtual vegetables, fruits and flowers, we can find outall the excitement is about.
| A．that | B．if | C．what | D．when |
With all the novels he was interested in, he left the library and went back home.
| A．borrow | B．borrowing | C．to borrow | D．borrowed |
——Do you know the answers to these questions asked by your little brother?
——Of course not, but I can’t let him know.
| A．them | B．one | C．those | D．that |