_______he couldn't understand was_________more and more students showed interest in the computer games.
| A．What； because | B．That, what | C．What； why | D．Why； that |
It rains very heavily in this area, which has _______ annual rainfall of 7,000 mm, _______
ideal environment for forests.
| A．the; an | B．an; 不填 | C．an; an | D．不填; the |
Why is he not allowed to stay here?, it’s his home．
| A．In all | B．After all | C．In other words | D．To be frank |
She is a diligent student, and all her spare time she hasstaying in the library．
| A．is spent | B．spent | C．to spend | D．to be spent |
I still remember how many years ago I last met her in the countryside．
| A．when it was | B．was it that | C．when was it | D．it was that |
His proposal is so idealistic that there are manydifficulties in putting it into practice．
| A．familiar | B．relative | C．practical | D．terrible |