Whenever you have a chance ________English,you should take it.
How time flies! Three years ____________ really a short time.
I felt it hard to keep up with my classmates. But whenever I want to ____________, my teacher always encourages me to work harder.
— How long have you ________?— For three days.
— You don’t look well, Don! You’d better see your doctor.— I ________, but he said there was nothing wrong.
—Can I help you?—I’d like ____________ for my twin daughters.