He made wild ______ about being able to cure cancer.
A. assertions
B. claims
C. declarations
D. statements
Which of the following elements is necessary for biological nitrogen fixation?
A. Copper
B. Zinc
C. Manganese
D. Molybdenum
John Ikenberry argues that Washington must work to strengthen the rules and institutions that ______ the Western order if it wants to preserve its leadership of the order.
A. wane
B. enshrine
C. underpin
D. proliferate
俄罗斯文学曾有一个灿烂的开端,其标志是12世纪成书的 。
A. 《伊戈尔远征记》
B. 《罗兰之歌》
C. 《尼伯龙根之歌》
D. 《煕德》