标签：英语四级试题下载,大学英语四级试题,英语四级真题下载,, 2017年6月大学英语四级完形填空模拟(1),
Directions： There are 20 blanks in the following passage. For each blank there are four choices marked A）， C）， B） and D） on the right side of the paper. You should choose the ONE that best fits into the passage. Then mark the corresponding letter in the Answer Sheet with a single line through the center.
The use of nuclear power has alread， 大小：859 KB