Look out! Can you see some boy students ________ basketball?
| A．plays | B．play | C．played | D．playing |
She devoted as much time as she could ____________ others.
| A．help | B．helped | C．to helping | D．Helping |
Sam is a little weak in English and he has _____ what the teacher says in class.
| A．difficult to understand |
| B．difficult understanding |
| C．difficulty to understand |
| D．difficulty understanding |
______ great fun they had singing and dancing last Sunday night!
| A．How a | B．What a | C．How | D．What |
Not only you but also he ________ to my birthday party.
| A．have been invited | B．has been invited |
| C．are invited | D．invited |
The floor requires_________.
| A．to wash | B．to be washing | C．washing | D．Washed |