—Shall we go for a picnic in the forest park tomorrow？
—Yes，________it rains heavily．
| A．if |
| B．unless |
| C．until |
| D．when |
－How long do you think the terrible weather will _______?
－Why not listen to the weather report?
| A．appear | B．last | C．change | D．discover |
－Oh, the traffic is too heavy.
－Let’s change ________route to the airport.
| A．other | B．others | C．the other | D．another |
－Can I join Oxfam Trailwalker?
－Only if you are ________ eighteen.
| A．over | B．on | C．under | D．below |
－Must we leave now?
－No, we ________. We still have two more hours.
| A．can’t | B．mustn’t | C．needn’t | D．shouldn’t |
－What’s your plan for this weekend?
－I’m going to ________ it with my grandparents.
| A．cost | B．spend | C．give | D．pay |