An interesting suggestion for measuring the atmosphere around Mars has been _________, thus leading a heated discussion among the scientists.
You will ____ those books one day.
.The 7.1-magnitude quake which struck Yushu on April 14th has left at least 2,039 dead, 195 _____ and 12,135 _____
Jack is going to spend his holiday in Paris next week, _____ lives his uncle.
On top of the books ____ the photo album you’re looking for.
____ time going on, our school becomes greener and more beautiful.