22. The sky is getting dark. It________ rain is on its way.

A. looks

B. looks like

C. seems to

D. will be

23. I am________ several important letters but nothing has arrived.

A. expected

B. looked forward to

C. waiting

D. expecting

24. I usually wear skirts but today I ________ trousers.

A. wearing

B. am wearing

C. wear

D. wears

25. Preserving natural resources________ of great importance.

A. is

B. are being

C. have been

D. are

26. Your voice reminds me of somebody, but I can’t remember________

A. it is

B. who is

C. who he is

D. whom