When _________ where he had put the book, he kept silent.
It’s hard to imagine_____it would be like living on Mars.
I don’t know_____the future holds in store for me,but I’ll face the storms of life bravely.
Stage fright is a common example of___educators call a“lack of confidence”among students.
—Have you finished the book?—No,I’ve read up to____ the children discover the secret cave.
I really don’t know______Tom lost his wallet.A.when was it that B that it was whenC. where it was that D. it was where that