It’s good idea to swim across the river without break.
A. a, a B. a, the C. the, the
The sign（标志牌）made us safe.
| A．feel | B．feels | C．to feel | D．felt |
Everyone should play a part in _____the earth.
| A．save | B．saves | C．saving | D．saved |
-- ________ will Mr. Green be back? -- In a week, I think.
| A．How often | B．How many | C．How long | D．How soon |
It's easy ______ a banana milk shake. Let me help you.
| A．do | B．to do | C．make | D．to make |
A: How do you make fruit salad?
B: ______ cut up three bananas and a watermelon.Next put them in a bowl.
| A．First | B．Next | C．Then | D．Finally |