Peter must be ill.It's the only thing that can ________ his strange behavior.
| A．lie in | B．result from |
| C．account for | D．explain about |
John Smith is _______ honest man.
| A．an | B．a | C．the | D．one |
______(Dog)dog is ______ useful animal.
| A．a, an | B．a, the | C．the, a | D．the, / |
A talk on Chinese history __________in the school hall next Monday.
| A．be given | B．has been given | C．will be given | D．will give |
--I saw Betty go to Grandpa Li's home just now.
--Yes. She’s often seen _________ the old man with the housework..
A: help B. to help C. helps D. helped
--Alice, you ________ on the phone. --I' m coming. Thanks.
A. want B-. are wanted C. are wanting .D. have wanted