27. The SAT is an excellent means of testing students. _____, it shouldn’t be only one of the many methods used.
| A．Therefore | B．And | C．However | D．Besides |
The soldiers put up a strong________in order to protect their country.
| A．performance | B．breakdown |
| C．defence | D．system |
Last year the number of the students who graduated with a driving license reached 200,000, a(n)________ of 40,000 per year.
| A．average | B．number | C．amount | D．quantity |
Only after they had discussed the matter for several hours ________ a decision.
| A．they reached | B．did they reach |
| C．they reach | D．do they reach |
I don't think ________ possible to master a foreign language without much memory work.
| A．this | B．that | C．its | D．it |
Child as he was, he ________ a good idea to solve the problem.
| A．came up with | B．came about |
| C．came into | D．came out with |