两道英语语法题
1a)....“one” specific time period or “two” different time periods is/are...是is还是are?
b)....one apple and two oranges is/are...
如果在and/or前面是单数/负数,而后面是负数/单数,这个时候的动词跟哪个...
2.Traffic was heavy,so by the time Brianne finally arrived at the theatre,we “waited” for her for an hour,missing the entire...
文中的wait的时态错了,请问正确的是什么?have waited 还是 have been waiting...为什么?