Making friends is not easy. Sometimes it can take years you become true friends with someone.
| A．before | B．after | C．because | D．Unless |
Their clothes were ______ colorful ________ I could not stop taking photos.
| A．too…to… | B．so…that… | C．although…but… | D．because…so… |
We know that 80 of the cases of blindness can .
| A．per cents; cure | B．percent; cured | C．per cent; be cured | D．percent; are cured |
—Is your father in ?—No, he _______ for three days.
| A．was out | B．has been out | C．went out | D．have gone out |
—Which would you like , tea or coffee?
—_______ is OK, I don’t mind.
| A．Both | B．Neither | C．Either | D．Every |
I have kept the book _______ the morning of May 1.
| A．on | B．in | C．since | D．of |