As we all know．____life is hard for any of us. If we live___ happy life，we must all work harder.
| A．／：／ | B．／；a | C．a；／ | D．a；a |
He seems to be giving the impression that he didn't enjoy himself in Paris. ___, he had a wonderful l time.
| A．Above all |
| B．what’s more |
| C．As a result |
| D．On the contrary |
Having finished her project, she was invited by the school_____ to the new students.
| A．speaking |
| B．having spoken |
| C．to speak |
| D．to have spoken |
Never before seen anybody who can play tennis as well as Robert.
| A．had she |
| B．she had |
| C．has she |
| D．she has |
You can borrow my car ___ you promise not too fast.
| A．unless |
| B．even |
| C．in case |
| D．a s long as |
You'd better write down the phone number of the restaurant for future ____.
| A．purpose |
| B．reference |
| C．progress |
| D．memory |