My brother has been teaching _______

My brother has been teaching ________ he was 21 years old.

#55820

when

for

since

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Stand over there, ______ you will get a better view of the whole city.

#58378

and

but

though

__________ the story is short and there are few new words in it, it is difficult to understand.

#57853

Though

When

For

In China, red represents power ______ it is also the color of strong feelings.

#58069

but

and

Milk quickly goes bad in summer        it is in a fridge(冰箱).

#57061

because

unless

when

Tom is only four years old, __________ he can draw beautiful pictures.

#56440

but

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