— Food problem is becoming a big one in China!
—I think the food ________ before going to shops or supermarkets.
| A．is checked | B．is checking | C．should be checked | D．should check |
—_______ can I keep the books?
—Two weeks.
| A．How long | B．How often | C．How far | D．How soon |
My mother often tells me _______ my classmates when they need.
| A．help | B．to help | C．helping | D．helps |
Do you prefer _______?
| A．skate | B．skates | C．skating | D．skated |
You should _______ the doctor’s advice and _______ the medicine on time.
| A．follow; eat | B．follow; take | C．take; eat | D．eat; take |
Sally sings pretty _______ and she is also _______ at dancing.
| A．well; well | B．good; good | C．good; well | D．well; good |