There ______ a dolphin show in the zoo tomorrow evening.
A. was B. is going to have C. will have D. is going to be
There is _____pollution and ____fishes in the river now than 20 years ago.
A. more, less B. more, fewer C. less, much D. fewer, many
The sign（标志牌）made us safe.
A．feelB．feels C．to feel D．felt
Everyone should play a part in _____the earth.
A. save B. saves C. saving D. saved
-- ________ will Mr. Green be back? -- In a week, I think.
A. How often B. How many C. How long D. How soon
It's easy ______ a banana milk shake. Let me help you.
A. do B. to do C. make D. to make
