______ it have been the failure to pick up directions from the ground control that caused the air crash?
Have you realized the part the computer has ________ in daily life?
Mr. King didn’t know __________ yesterday evening.
I thought she must be from Shandong Province because she spoke with a strong Shandong _________.
She had an advantage over others because she had a good ________ of both Chinese and English.
− Have you __________ any new ideas?− Yeah. I’ll tell you later.