He is,___,the best man for the job
—Where did you get The Frog written by Mo Yan?—I picked it up from a bookshop online if you ________ know.
When I lived with my roommates in the university, we ________ often talk into the night.
________ your letter, I would have set off two days ago.
You ________ in person; a telephone would have been enough.
I felt surprised that anyone of his intelligence ________ such an easy test.