It is important _______________ at others.
| A．to not laugh | B．not to laugh |
| C．not laugh | D．to laugh not |
---________ did you go hiking? --- last weekend.
A. When B. What C. Where
My parents went to Zhongshan _______ bike.
A. by B. on C. with
Look! The children _________ their classroom!
A. cleaned
B. are cleaning
C. are going to clean
How ________ you ________, Zoom?
A. do, feel B. are, feel C. are, feeling
What ______ Mike and Sarah going to do?
A. is B. are C. am