Scientists from different countries are trying to_______ a good way to solve the energy problem.
| A．keep up with | B．come up with | C．catch up with | D．meet up with |
----Do you often use Baidu?
----Yes, it’s one of ___________Internet search engines.
| A．popular | B．the popular |
| C．more popular | D．the most popular |
I’m glad___________.
| A．hear from you | B．to hear from you |
| C．hear a letter from you | D．to hear a letter from you |
The smile on his face makes him _______ really ______.
| A．looks, kind | B．look, kindly | C．to look, kindly | D．look, kind |
Of the two T-shirts，I’d choose the___one to save some money for a book．
| A．cheapest | B．cheaper | C．more expensive | D．most expensive |
Students in the USA spendtime their homework than we do.
| A．little , to do | B．little, doing |
| C．less , doing | D．less , do |