—_____ that he picked up French? —It was in 2010_____ he traveled in France.
Every solid object______reflect a sound,varying according to the size and nature of the object.
Are you certain that this is _________in his speech?
— How do you Chinese celebrate Mid-Autumn Day?— Well,it depends.For me,I usually sit in the yard,________the full moon with my family.
Although the false banknotes fooled many people,they did not____close examination.
These natural parks aye very important for preserving animals,which would_______-run the risk of extinction.