The Science Museum, ____________ we visited during a recent trip to Britain, is one of London’s tourist attractions．
| A．which | B．what | C．that | D．where |
Bring the flowers into a warm room __________ they'll soon open.
| A．or |
| B．and |
| C．but |
| D．for |
Please do me a favor-__________ my friend Mr. Smith to Youth Theater at 7 ： 30 tonight.
| A．to invite |
| B．inviting |
| C．invite |
| D．invited |
If you have a job，__________ yourself to it and finally you'll succeed.
| A．do devote |
| B．don't devote |
| C．devoting |
| D．not devoting |
-Do you think you could do without help?
-__________. This is not the first time for me.
| A．Take care |
| B．Hurry up |
| C．Not exactly |
| D．Don't worry |
Find ways to praise your children often，__________ you'll find they will open their hearts to you.
| A．till |
| B．or |
| C．and |
| D．but |