Although he talked half an hour, he couldn't give us a good ________ of the reason why he did it.
Premier Wen Jiabao has strongly advised greater efforts to ease poverty, __________ the environment and adjust(调整) the economic structure in southwest China’s Guizhou Province.
----So you missed the lecture given by Professor Smith. -------____.I got there 30 minutes before it finished.
The time of the last term , ________full use of ________the college entrance examination , will be very important to every senior three student .
____ in a branch of the tree ___ a note which read "I'll meet you at the School Gate".
Mother asked the youngest kid _______with his toy car.