.It is warned that no one is permitted______the lab after 10:00 p.m.
| A．enter | B．to entering | C．to enter | D．entering |
. He is very busy. I don’t know if he _____ or not tomorrow.
| A．come | B．comes |
| C．will come | D．is coming |
“Have you seen _______ new bike? I put it here just now.” “Is it _______ white one? A boy has ridden it away.”
| A．a; a | B．a; the |
| C．the; the | D．the; a |
“What place is it？” “Haven’t you found out we _____ back where we ______？”
| A．were, had been | B．have been, are |
| C．are, were | D．are, had been |
“Have you seen _____ pen? I left it here this morning.” “Is it _____ black one? I found it in the corner.”
| A．a, the | B．the, the |
| C．a, a | D．the, a |
. He has changed a lot. He _______ not what he _______.
| A．is, is | B．was, was |
| C．is, was | D．was, is |