Tom needs some help ______ his homework. Can you help ______?
To solve the traffic problem, more and more bridges ____________ across the river every year.
Be quick! Jim _______________ for us downstairs.
—How long have you __________ this book?—About thirteen days.
—_________is it from your school to your house? —Only a few minutes’ ride.
The _____________ we do our homework, the __________ mistakes we will make