______ him well, I would have invited him to my birthday party.
| A．Had I known | B．Should I know |
| C．If I know | D．If I knew |
Our chemistry teacher announced that he would do the experiment in a different way
we might find interesting.
| A．which | B．in which | C．in that | D．whom |
While she is a lovely girl, she be extremely difficult to work with.
| A．may | B．must | C．should | D．can |
A dictionary is necessary if you want to learn English, so you’d better buy .
| A．this | B．that | C．it | D．one |
–Jimmy had a lot of parties recently.
—Yes, that might why he didn’t do well in the test.
| A．sum up | B．add up to | C．account for | D．make sense of |
—I didn’t attend the lecture yesterday.
—I ______, either, if my mother hadn’t reminded me.
| A．wouldn’t | B．wouldn’t have | C．didn’t | D．hadn’t |