以下是我的一些错题集和当时自己做的答案,自己是大学生了,但是好像还是不太明白,

以下是我的一些错题集和当时自己做的答案,自己是大学生了,但是好像还是不太明白,
13.I have
____ bad cold and have to stay in ____ bed.
A.a,/ B.a,the C.a,a
此题我感觉是选A,答案也是正确的,但是我是凭语感做的,为什么bad cold前要加a?stay in
bed为什么不用定冠词?
18.There is ______ “m” and ______ “u” in music.
A.a,an B.
an,a C.an,an
此题我选不出,其实我是想前面填a,后面也是a的,我知道u发“U”音的时候是用a,但是不明白前面的那个m明明是辅音字母开头,为什么答案是B用a
“m”?
14.Give _____ to _____,please.
A.them,she B.them,her C.it,
her
此题答案我选c,a我知道不对,但是为什么正确答案是B而不是C呢?
3._____ it ______ warmer tomorrow
than today?
A,Does,be B.Will,is C.Will,be
此题我选了B,不明白为什么要选C
2.
Would you like some mooncakes?_________
A.No,thank you.I’m full.B.OK.
I’m hungry.
C.No,I wouldn’t.
此题我也觉得A对,但是也不觉得C错啊,
11.Can you
stay here longer?_____,but I have to be back tomorrow.
A.I’d love to.B.
No,thank you.
C.I’m afraid not.
此题我选了A,但是答案是C,明明后面有but,前面应该是相反意思,应该选A才对啊
9.The cat helped Tom ______
the mouse.
A.catch B.caught C.catching
此题我不知道要选什么,答案是选a的,是因为help sb
do sth的短语吗?还有多少这样的词组是加动词原形的?
14.Jim is running _____ slowly than me,and Ben
is running ______ faster than me and Jim.
A.much,much B.more,much C.
more,most
此题完全不知怎么选,按理我认为应该都写more的