Last night I called him. ______ 8:30, bu

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问题选择题

Last night I called him. ______ 8:30, but he was not in. [ ]

A. by

B. at

C. in

D. on

答案

答案：B

选择题

为下列句子选择正确图片。

( ) 1. I'm going to the USA by plane.

( ) 2. They're going to the park by ship.

( ) 3. She is going home by subway.

( ) 4. She is going to school by bike.

( ) 5. He is going to work by bus.

( ) 6. Mike is going to take a trip by train.

单项选择题

饲料原料和饲料产品中三聚氰胺限量值为（）。

A、5.0mg/kg

B、25mg/kg

C、2.5mg/kg

D、1.0mg/kg