When I met my teacher and wanted to express how grateful I was, words _________ me.
| A．stopped | B．defeated | C．beat | D．failed |
23.— It’s a long time _____ I saw you last.
— Yes, and what a pity! It will be a long time ____ we see each other again.
| A．before, since | B．since, before | C．when, when | D．since, when |
22.______ in natural gas and oil, so this area is worth developing.
| A．Being rich | B．It is rich | C．It being rich | D．To be rich |
21.Here’s one of the best ways to protect your skin—_____ too much sunshine.
| A．not to absorb | B．not having absorbed |
| C．having not absorbed | D．don’t absorb |
20.There used__________a post office at the corner of the street.
| A．to be | B．to being | C．to have | D．to having |
19.It is ________ who ____________ wrong.
| A．me; me | B．me; is | C．I; am | D．I; is |