选择适当的介词填空。
(1)Kate is ________ America. Now she is ________ Beijing.
(2)I can't sit ________ Sarah. She is so tall. I can't see the blackboard.
(3)— Are these cakes ________ me?
— No, they aren't.
(4)— What's this ________ English?
— It's a watch.
(5)— Who's that boy ________ blue?
— He is Mike.
(6)It's time ________ get up. I often get up ________ six.
(7)Who's ________ duty today?
(8)Lucy is studying ________ the classroom.
(9)Put ________ your shoes, please. It is time ________ PE class.
(10)I often do my homework ________ the afternoon.
【答案】（1）from；in
（2）behind
（3）for
（4）in
（5）in
（6）to；at
（7）on
（8）in
（9）on；for
（10）in
【解析】⑴句子意思是: 凯特来自美国. 现在她住在北京. be from 意为“来自……”,“in + 地点”表示“在……”， 故应填from; in.
⑵句子意思是: 我不能坐在Sarah后面. 她个子那么高. 我看不到黑板. 从后文的She is so tall. I can't see the blackboard.可知“我不能坐在后面”,在......后面behind, 故填behind.
⑶句子意思是: 这些蛋糕是给我的吗? 不是. 英语中表示"给谁,为了谁"用“for”. 故填for.
⑷句子意思是: 这个用英语怎么说? 它是一块手表. in English意为"用英语". 故填in.
⑸句子意思是: 那个穿蓝色衣服的男孩是谁? 他是Mike, 穿…..颜色的衣服”用短语 in + 颜色, 故应填in.
⑹句子意思是: 该起床了. 我经常6点起床.“It is time + to + 动词或动词词组”表示"该做某事了", 在具体的时间前用介词at, 故应填to; at.
⑺句子意思是: 今天谁值日. on duty意为“值日”. 故应填on.
⑻句子意思是:Lucy正在教室学习. 表示"在……里面”用in, 故应填in.
⑼句子意思是: 请穿上你的鞋子. 该上体育课了. put on意为"穿上","It is time + for + 名词或名词性短语”表示"该做某事了".故应填on; for.
⑽句子意思是: 我经常在下午做作业.in the afternoon意为"在下午",类似用法还有:in the morning, in the evening. 故应填in.