(2013·甘肃兰州、靖远名校高三模拟)Social practice is an opportunity for students to gain________better understanding of how________society operates

Silly me! I forget what my luggage looks like.—What do you think of over there

Single-parent usually____ some of the functions that absent adult in the house would have served under the financial crisis.

______ your brother Daniel in Class 1, Grade 7 –No,he’s in Class 2.

I will visit Austria ______ the invitation of my friend this summer vacation