We often see Betty ____ the old man with his housework.
— _____ Dasan is from Canada, he can speak Chinese very well.— I know he studies Chinese hard.
My sister is only two years old, and I have to _____ her on Sunday.A. look for B. look after C. look like D look at
—What are you doing for your vacation?—________________________.
—I’m tired and stressed out. —You should ___________.
—_________is very interesting to swim in the river in summer, but it’s dangerous.