单项选择题

Brushing removes larger particles, but dentists suggest brushing the back of the tongue as well, where food residues and bacteria ________. （）

A．gather
B．collaborate
C．congregate
D．collect

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单项选择题

Which of the following statements is true about paraphrasing according to this video?
A、We cannot use more than two methods even though we are 100% sure.
B、We shouldn't replace the words with similar meanings.
C、We should use all the methods we’ve learned even though we are not 100% sure.
D、We can use one method only in each sentence.

单项选择题

以下诗句由王勃所作的是“（）”。

以下诗句由王勃所作的是“（）”。

A.海上生明月，天涯共此时。

B.海内存知己，天涯若比邻。

C.红豆生南国，春来发几枝。

D.君自故乡来，应知故乡事。