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2. Every student is required to write an essay on the topic.
A. Every student might write an essay on the topic.
B. Every student must write an essay on the topic.
C. They require every student write an essay on the topic.
D. Every student should write an essay on the topic.
3. It isn't necessary for us to get a visa for Singapore.
A. We needn't get a visa for Singapore.
B. We mustn't get a visa for Singapore.
C. We mayn't get a visa for Singapore.
D. We shouldn't get a visa for Singapore.
4. The girl just said hello. She is Tom's youngest sister.
A. The girl who just said hello is Tom's youngest sister.
B. The girl saying hello is Tom's youngest sister.
C. The girl just said hello is Tom's youngest sister.
D. The girl, who just said hello, is Tom's youngest sister.
5. I'm waiting for the bus. It is late.
A. The bus which I'm waiting is late.
B. The bus whom I'm waiting for is late.
C. The bus for that I'm waiting is late.
D. The bus I'm waiting for is late.