I had intended to call on you yesterday, but someone____(come) to see me.
查看答案
When Tom was a little boy, he already knew the sun____(be) the center of the solar system.
He said he ____(write) a report since two o’clock that morning.
When she was here, she always____(complain) about the living condition.
Mary is spreading ____ (butter) on her bread.
微信支付 
支付宝支付