_______, when Marx was already _______, he found it was important to study the situation in Russia, so he began to learn Russian.
Theboyisfourteen________.
Iamastudent________IamChinese.
_______isTom'sfriendfrom? HeisfromShanghai.
________areBob'sgrandparentsandtheyareverynice.
“What'syourfather's________?”“Heisahotelmanager.”