English problem?问题补充：选择、翻译下列句子意思？？？1.The monitor is__charge_

English problem?问题补充：选择、翻译下列句子意思？？？1.The monitor is__charge__the class.A.in,of B.on,of C.at,on D.in,on2.He__many beautiful post cards to us.A.takes B.shows C.obtain D.has3.The big tree__a lot of apples.A.bears B.wears C.grows D.takes4.Please__me to introduce my sister ti you.A.give B.have C.allow D.ask5.An overseas student studies__.A.aboard B.abroad C.at sea D.on board