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题型：单选题题类：常考题难易度：普通

In order to enter the PE exam, now we spend at _____ least half _____hour a day at school.

A、a; an B、the; a C、不填; an D、不填; a

举一反三

I've had ______ bad cold, so I don't think I can go to ______ school today.

If you buy ________ MP4 player in our store, you can get a watch for ________ free.

Eating too much salt is bad for your health． (改为同义句)

Eating too much salt{#blank#}1{#/blank#} {#blank#}2{#/blank#}to your health．

Tom knocked ________ the door, ________ nobody answered.

______ new study says that going to _______ bed late is harmful to our health.

—What color is it?

—It's ______ orange. It's _______orange pencil.

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