The Sanlu Milk Powder event is a clear indication that food safety is a big problem; nobody can __ _ all foods are secure to us, but we are sure that the situation is turning for the better.
| A．acknowledge | B．guarantee | C．identity | D．clarify |
----Can you come to the party on Saturday, Peter?
---- Oh,__________ I’m already going out, I’m afraid.
| A．cheer up! | B．what a pity! | C．why not? | D．I’d rather not. |
My son has gone abroad．I’m looking forward to him ______．
| A．return | B．to return |
| C．returning | D．returned |
_____ in the woods，the two girls were frightened and kept crying．
| A．Having lost | B．Lost |
| C．To be lost | D．Being lost |
I ______ to reach the manager for the last two hours but the line is always busy．
| A．tried | B．have tried |
| C．had tried | D．have been trying |
——How do you usually go to work？
——I usually drive，but if it is fine，I ______ by bike．
| A．will go | B．would go |
| C．have gone | D．had gone |