1 . The day itself is on October 21, but since it ________ ________ ________, events now spread out over most of October around Britain. (变得流行；catch)

2 . ________ ________ ________ ________ them to wander a bit, to take a moment to see what’s around them. (从未发生；occur)

3 . We sought long and hard for the solutions to the problem, but the efforts ________ ________ ________. (无济于事；in)

4 . If weather p_____, we will have a picnic next week.

5 . We have a registered letter for you. You can pick it up ___________ (在你方便的时候).

6 . Taxi drivers around the world have __________ (起来反抗) ride-sharing companies.

7 . How many people ____________ (死于被动吸烟) worldwide every year?

8 . It hasn’t been decided yet__________ the new restaurant will open.

A．whose

B．that

C．when

D．which

9 . Will you tell me_______ I can keep fit and healthy?

A．that

B．what

C．which

D．how

10 . The trouble is ___________he can find a new job.

A．where

B．who

C．what

D．why