—Which is the longest river in China，the Changjiang River or the Yellow River?
—The Changjiang River. The Yellow River is river in China.
| A．the second longest | B．the second longer |
| C．a second longest | D．the second long |
Fred doesn’t eat any vinegar because he thinks it’s __________.
| A．salty | B．sour | C．sweet | D．spicy |
There are no calories in __________.
| A．Coke | B．milk | C．vegetables | D．water |
It’s important __________.
| A．for us to learn English well | B．to us to learn English well |
| C．for us learning English well | D．of us to learn English well |
__________ is (are) healthy food.
| A．Fish | B．Ice-cream | C．Cakes | D．Hamburgers |
—__________ do you swim? —Twice a week.
| A．How long | B．How many times | C．What time | D．How often |