We were about to climb up to the top of the mountain ________ it began to rain heavily.
18. I’m surprised that you should have been fooled by such a(an) ____trick.
17. It’s known that taking exercise______your health.
16. He gave a ________smile.
15. They gave a banqnet( 宴会)_____the guests from Britain.
14. I’m really tired_____Tom . He had me _____for two hours in the rain .