In order not to be disturbed,I spent three hours ___B___ in my study.A.locking B.locked C.to lock D.being lockedNearly every great building in Beijing was built ___B____ south.A.to face B.facing C.to have faced D.being facing
问题描述：
In order not to be disturbed,I spent three hours ___B___ in my study.
A.locking B.locked
C.to lock D.being locked
Nearly every great building in Beijing was built ___B____ south.
A.to face B.facing
C.to have faced D.being facing
答