—How do you plan to travel to Beijing, Jack?—I haven’t made up my mind ________to go by plane or not.
April is month of the year in Thailand.
Things made of plastic are usually _______, but they are _______ to get polluted.
---Is your sister’s room as as ? ----No,it isn’t.
John doesn’t play the piano _________________ his classmates in his class.
He is a ___________ student, and he always listens to the teachers ___________.