In China,___bicycle is___popular means of transportation(交通).
I wonder if she______us,but I think if she______us we will be able to complete the task ahead of time.
—I heard Charlotte had been drowned in the lake.—Really!Her boat turned______,and ______she couldn’t swim.
Despite his great efforts,he ______unsuccessfully after all.
—How______do you attend the evening classes?—______,three times per week.
When they had finished playing,the children were made to ______ all the toys they had taken out.