They don’t know _____ (if / whether) to go or wait.
句意：他们真的不知道是去还是等。if / whether 同义，当后面有 or 时，必须用 whether，故答案为 whether。
2018年12月，张阿姨把4000元的存入银行，定期三年，年利率是2.75%到期后，应得利息______元.
They don’t know _____ (if / whether) to go or wait.
I really don’t know _____ (how much / how soon) the bridge will be finished.
She said _____ (that / if) it wouldn’t matter much.
The prices of the vegetables in this market are very _____ (high / expensive).
—I hate rainy days. —_____ (So do I / So I do).
He isn’t going to have the concert tonight, _____ (isn’t he / is he)?
It’s going to rain, _____ (isn’t it / is it)?
—Have you been to this school? —No, _____ (I haven’t / I didn’t).
friend, matter, your, is, with, what, the (?)
