题干
On his _________ from Australia we gave him a welcome party.
A：came back
B：return
C：return back
D：went back
答案(点此获取答案解析）
B
On his _________ from Australia we gave him a welcome party.
A：came back
B：return
C：return back
D：went back
，爸爸买了7个 
，爸爸买的比妈妈买的少几个？