---What’s the matter with you? ---After the long walk, my legs and I couldn’t go any further.
I found the lecture hard to follow because it ______ when I arrived.started B. was starting C. would start D. had started
--- What time is it?--- I have no idea. But just a minute, I ______ it for you.
The best moment for the football star was ______ he scored the winning goal.
______ the forest park is far away, a lot of tourists visit it every year.
There are still many problems ______ before we are ready for a long stay on the Moon.