A model or an experiment in a science class can help us see things which would_______ remain hidden.
| A．therefore | B．yet | C．otherwise | D．still |
---I was so disappointed when failed again.
---Don’t be so discouraged. You’ll be successful ________.
| A．for some time | B．at one time | C．on time | D．in time |
---The accident is __________.
---Yes. Let’s comfort the __________girl.
| A．terrifying; terrified | B．terrifying; terrifying | C．terrified; terrifying | D．terrified; terrified |
Looking up, I saw some children __________rags were looking at me silently as I ate.
| A．by | B．in | C．with | D．on |
The letter I have been looking forward to _________.
| A．arrive | B．has arrived | C．arriving | D．arrival |
_______is known to us all is that the 2016 Olympic Games will take place in Rio de Janeiro.
| A．What | B．which | C．As | D．It |