______ such a chance, why don’t you have a try?
A. To give
B. Given
C. Having
D. Giving
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I’m very sorry _______ that?
A. for hearing
B. to hear
C. with hearing
D. of hearing
My job is_______ (look) after the children.
第一个被找到的黑洞是什么?
A. 麒麟V616
B. LMCX-1
C. 天鹅座X-1
D. LMCX-3
宇宙中天顶有效噪声温度是多少?
A. 3.0K
B. 3.2K
C. 3.5K
D. 4.0K