We _____ more than 1,600 words since we began to learn English.
Can you come to my birthday party next Sunday? ______, I cant. I have to______ for the math test.
The students in this school plant ______ trees every year.
Tim, do you think time is money? Yes, but I think it is ______ money.
Robots are ______ do the same things as we do.
Eli did ______ in painting, but Sam did ______.