Unfortunately, not everyone has realized the important part that healthy diets in their daily life.
| A．play |
| B．playing |
| C．to play |
| D．are playing |
What an unforgettable experience! I’ll write it down ______it is till fresh in mymemory.
| A． before | B．so that | C．while | D．until |
– Guess what, we’ve got our visas for a short-term visit to the UK this summer.
– How nice! You _______ a different culture then.
| A．have experienced | B．will be experiencing |
| C．have been experiencing | D．will have experienced |
It was 80 years before Christopher Columbus crossed the Atlantic______ Zheng sailed to East Africa
| A．when | B．that | C．after | D．since |
All of my teachers but the math teacher ______ he cheated in the exam.
| A．doubt that | B．doubts that | C．doubt whether | D．doubts whether |
The teacher told us that everyone has an important role ________in protecting the earth from________.
| A．to play; to pollute | B．to be played; to be polluted |
| C．to play; being polluted | D．to be played; being polluted |