Many road accidents occur because drivers cannot ______ the speed of approaching vehicles.
. __________ by a greater demand of vegetables, farmers have built more green houses.
. The flowers his friend gave him will die unless __________ every day. A. watered B. watering B. water D. to water
. Please remain __________ until the plane has come to a complete stop.
. “Things __________ never come again!” I couldn’t help talking to myself.
. Jenny hopes that Mr. Smith will suggest a good way to have her written English __________ in a short period.