is said ________ abroad, but I don’t know what country he studied in.

Scientists are convinced ___ the positive effect of laughter ___ physical and mental health

Now, some robots are __ to do the same things _ _people.

I don’t know _______he will come tomorrow. _______he comes, I’ll tell you.—That’s a deal!

179 Please don’t _____ a joke on thedisable We should try our best to help them