How_________I help them to understand when they won’t listen to me?
Mary’s mother told her daughter not to spend too much time surfing the Internet, but ______ didn’t help.
The firefighters would not allow anyone______ into the room on fire to collect anything.
_______ the Water Cube, we were surprised by the design.
---What do you think of the American singer Lady Gaga’s performance?---Too crazy, but if I _____to her concerts held yesterday, I would have enjoyed it.
I won’t call you ________ something unexpected happens.