I don’t know why he is so absorbed in collecting stamps, _________________. (你不妨当面问问他好了).
举一反三
- I don't know why he isn't here.
- I don’t know why he ________ in the middle of a sentence.
- —I don’t know ______ he will come tomorrow.—Don’t worry. If he comes, I’ll tell you. A: whether B: B. where C: C. why
- I don’t know the reason he is late. A: that B: which C: weather D: why
- I don’t know the reason ______ he is late. A: that B: why C: which D: how