We are classmates. We must help .
| A．for each other | B．in each other |
| C．to each other | D．each other |
—Daddy，can you come home for supper with us this weekend？
—________，but I might be a little late．
| A．I’m busy |
| B．Hard to say |
| C．Of course |
| D．Never mind |
I wondered________a famous singer because her voice wasn’t so beautiful．
| A．whether Lily would become |
| B．if Lily will become |
| C．whether Lily will become |
| D．if would Lily become |
It’s________to play on the road．You’d better play in a________place．
| A．safe；dangerous |
| B．safety；danger |
| C．safe；danger |
| D．dangerous；safe |
There are so many kinds of pens in the shop that I can’t decide________．
| A．when to buy |
| B．where to buy |
| C．what to buy |
| D．which to buy |
—Excuse me，could you tell me________a book about science？
—Sure．They are on the second floor．
| A．where I can buy |
| B．where can I buy |
| C．when can I buy |
| D．when I can buy |