Tom was about to close the window ________ his attention was caught by a bird.
| A．when | B．it | C．and | D．till |
— The food here is nice enough.
— My friend ______ me a right place.
| A．introduces | B．introduced | C．had introduced | D．was introducing |
______ the police thought he was the most likely one, since they had no exact proof about it, they could not arrest him.
| A．Although | B．As long as | C．If only | D．As soon as |
Either you or one of your students ______ to attend the meeting that is due tomorrow.
| A．are | B．is | C．have | D．be |
You and I could hardly work together, _____ ?
| A．could you | B．couldn’t I | C．couldn’t we | D．could we |
Please do me a favor — ______ my friend Mr. Smith to Youth Theater at 7:30 tonight.
| A．to invite | B．inviting | C．invite | D．invited |