His father is engineer. He designed such useful machine

 His father is      engineer. He designed such     useful machine

#33029

a an

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an an

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推荐题目

—How do you go to ______ work?—I usually take ____bus．

#34574

a，a

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/，a

the，a

The boys often play___ guitar in __afternoon.

#32139

the; /

/;the

the; the

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 ----How many students are there in your class?---- __________ number of the students in our class __________ 40.

#33106

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A, is

A, are

Let's look at the bag. Can you see _____“s” on the corner of_____ bag?

#33777

a, a

a, the

an, a

an, the

He speaks ________ fast ________ I can’t follow him．

#32507

so；that

such；that

so；as to

enough；that