on’t seem to be quite yourself today.What’s wrong—Oh, I’m suffering from a cold.Nothing serious ________.

The computer system ___suddenly while he was searching for information on the Internet.

________ is quite natural,a beginner can’t read the books written in English very quickly

n had expected to see all his relatives when inhospital, but _________ came to see him while many of his friends offeredhim their help

Why do you make friends with Joe —-He isn’t a good student, but ________ he is honest(诚实的).