—Could you hang out with me, Kate?
—Sorry, I ________. I have to do my homework.
句意:——你能和我去散步吗,凯特?——对不起,不能。我必须做作业。
考查情态动词用法。couldn't不能,过去式;needn't不需要;can't不能;shouldn't不应该。根据“I have to do myhomework.”可知,空格处应为否定回答;句型“Could you…?”中could表示委婉语气,其否定回答为“No, I can’t.”,故选C。
—Could you hang out with me, Kate?
—Sorry, I ________. I have to do my homework.
“天问一号”在经历了7个月的“奔火”之旅和3个月的“环火”探测,完成了长达5亿千米的行程,登陆器“祝融”号火星车于2021年5月15日7时18分从火星发来“短信”,标志着我国首次火星登陆任务圆满成功,请将5亿这个数用科学记数法表示为( )
We ________ see which way to go if the stars do not twinkle(闪耀)so.
下列数轴表示正确的是( )
Bill is running so fast!I _________ believe my eyes.
|-2021|=
— Good news? You’ve passed the PE test.
— Hooray! ______,I was worried about it.
Too much fast food is bad for us. We should only have it _____.
It is ________ hot today. We'd better stay at home.
—Jane, I'm late for your party _______ an accident. I'm sorry.
—It doesn't matter. Enjoy yourself here.