I saw Susan in the library just now.—No, it _______ be her. She went to Shanghai this morning.

What’s wrong with Simon He isn’t at school today.—His legs hurt. He was by a motorcycle this morning.

下列各句中，表达得体的一句是（ ）

Do you feellike ________there or shall we take a bus?-I’d like to walk, but since there isn’t much time left, I’d rather we________ a taxi.[ ]

We must study harder, ______ we’ll not pass the exam.