Sweet wormwood(青蒿) is a common plant in China. Tu Youyou is the woman________ used the plant's special power to save millions of lives.
A. which
B. who
C. whose
D. /
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- Do you know ________ yesterday?-Yes. He went for the boat race.
A. why didn't Peter go to school
B. why doesn't Peter go to school
C. why Peter didn't go to school
D. why Peter doesn't go to school
-Alice,could you tell me when your sister ________ from Harbin?-I'm not sure. I'll call you when she ________.
A. will come back; will return
B. comes back; will return
C. will come back; returns
Mr Jackson hasn't decided ________this weekend.
A. where he will have a picnic
B. where will he have a picnic
C. where he had a picnic
D. where did he have a picnic
As middle school students, we should start thinking about________ for our country in the future.
A. what we did
B. what did we do
C. what we can do
D. what can we do