21. The traffic rule says young children under the age of four and ________ less than 40 pounds must be in a child safety seat.
A. being weighed B. to weigh C. weighed D. weighing
22. The final score of the basketball match was 93: 94. We were only________ beaten.
A. nearly B. slightly C. narrowly D. lightly
23. ----Waiter! How soon can I get my food? I just have half an hour left before my train leaves.
---- It________ be ready in five minutes.
A. may B. should C. could D need
