_____ computers are convenient to us in daily life, it may also cause other problems.
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.
________ from the bright smile on his face, he ________ in passing the job interview.