It is uncertain ______ side effect the medicine will bring about, although about two thousand patients have taken it.
| A．what | B．that | C．how | D．whether |
Many teens don’t have enough sleep because they have too much homework, which ______ them up at night.
| A．makes | B．stays | C．turns | D．keeps |
Food safety is ______ important, so the government spares no efforts to prevent food pollution.
| A．strongly | B．reasonably | C．highly | D．naturally |
—May I try the jacket on?
—______，but I think it will be too small for you.
| A．As you like | B．By all means | C．As a result | D．Believe it or not |
She thinks she can get there
on time, _______she?
| A．can | B．can’t | C．doesn’t | D．does |
The headmaster thought _______ necessary to invite Professor Brown to give us a lecture.
| A．that | B．it | C．this | D．him |