—We all had a lot of fun at the barbecue yesterday. Pity you weren’t there.
— I really should have gone with you, but I ________ on some remaining problems.
| A．was working | B．would work | C．worked | D．had worked |
Too much pressure from study leads to sleeplessness, which _______ increases the risk of forgetfulness.
| A．in turn | B．in return | C．by chance | D．by choice |
The gym is a public place, so you should be ________ and leave all the machines clean after using them.
| A．considerate | B．cautious | C．subtle | D．modest |
The ability to _____ one another for past wrongs is one of the greatest attributes that anyone should possess or exercise.
| A．explain | B．forgive | C．excuse | D．apologize |
They were close ______ each other in high school and now are still ______ touch.
| A．to; with | B．to; in | C．with; in | D．with; with |
—I have won the first prize in the recent English contest.—______________!
| A．Congratulations | B．Cheers | C．Best wishes | D．Good luck |