I’m sorry, Bill. I _________ the book to you last week, but I was so busy that I forgot to do so.
| A．must have returned | B．could return | C．should have returned | D．might return |
The result was far beyond we had expected, brought great joy to every one of us.
| A．that; which | B．than; that | C．what; what | D．what; which |
It is the America’s selling weapons to Taiwan cast a shadow on the Sino—US relationship.
| A．what | B．which | C．that | D．where |
The ground has been cleared and houses for those homeless people now.
| A．build | B．have built | C．are built | D．are being built |
serious the economic situation is, they still have confidence in overcoming all the difficulties.
| A．Whatever | B．Although | C．Even though | D．However |
The teacher that his students had difficulty in English grammar, decided to give them more examples.
| A．knows | B．to know | C．knowing | D．being known |