【英语】选择题求分析*21.---Where is our English teacher?---He _______

【英语】选择题求分析*2
1.---Where is our English teacher?
---He _______ to the USA.He _______ there for three times.
A.has gone to;has been to
B.has been to;has gone to
C.has gone to;has been
D.has been to;has gone
2.The leader ordered the officer ________ the gates.
A.lock
B.locking
C.to lock
D.locks
求分析~