Don’t promise anything ________ you are one hundred percent sure.
| A．if | B．after | C．when | D．unless |
Tiananmen Square is 125,000 square metres _______
| A．size | B．in size |
| C．in long | D．in tall |
The post office is near here. You can go there _____ foot. You don’t need to go there _____ a bike.
| A．on ; by | B．on; on |
| C．by; ride | D．on ; ride |
________ the evening _______ August 13th, the Olympic Games were held in Athens.
| A．On ; of | B．At ; on |
| C．Of ; on | D．In ; of |
--- It’s so cloudy. I think it. ---I think so.
| A．rain | B．rains |
| C．is going to rain | D．is raining |
---There goes the bell.
---It’s time for class. Let’s stop.
| A．talk | B．to talk |
| C．talking | D．not talk |