－He looks very worried.
－I wonder ______________________.
| A．why does he look so |
| B．whether he has met difficulties |
| C．that he isn’t in trouble |
| D．when did it happen |
My mother_________500 yuan_______the bike.
| A．paid, on | B．paid, for | C．spent, to | D．spent, in |
I'd like to know __________or not.
| A．whether will he come | B．if he has come |
| C．whether he will come | D．that he will come |
We arrived _______the farm ______ a Tuesday morning .
| A．to, on | B．in, at | C．on, in | D．at, on |
I'm going for a field trip but I haven't decided_________.
| A．what to do | B．to do what |
| C．where to go | D．to go where |
－Must I go and get some water now?－No, you __________.
| A．needn't | B．may not | C．mustn't | D．don't |