Some experts are warning that the step the USgovernment has taken to deal with the current crisis between China and Japan is______ of much risk

s very clever and worthteaching , but her brother is not .Look ,he is now asleepin class .

Jane is not good at sports，but when itto cooking，she’s excellent．

Both the Winter and Summer Olympics are held ___________on a regular basis.

In order to attract more online shoppers on Double-Eleven Day, the owners of Taobao promised that they would have those ordered goods _____ to their homes in less than 3 days.