--When did you become a volunteer for the elderly?-- Two years ago. I this group since then.

--When did you become a volunteer for the elderly?-- Two years ago. I        this group since then.

#42442

joined

took part in

have joined

have been in

推荐题目

Where ______my shoes? I can’t find ______．

#40304

is：it

does；it

are；them

do；them

My school life ___________in the past few years.

#42001

changed

has changed

have been changed

is changing

—Why weren’t you at the meeting? —I        for a call from my husband in Guangdong.

#41625

waited

had waited

was waiting

will wait

–There        great changes in Nanjing in the past few years. –I agree. And some more lines of the underground will be in service this year.

#37111

will be

are

were

have been

Since we ________ our homework now. Let’s have a rest.

#41543

are doing

will do

have done

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