--- Why did you buy two pairs of shoes?--- It was so hard to choose which was________, so I took them both.
—What languages________in that country? —German and English.
Battery-operated slippers are used________seeing in the dark.
The Eiffel Tower________by the French engineer Alexandre Gustave Eiffel for the Paris Exposition(巴黎博览会)of 1889.
—I won’t come to the party unless Sue________,too. —You mean if Sue comes,you will come.
It________me half an hour to reach the top of the mountain.