I was just at the school gate the bell rang.
| A．while | B．because | C．if | D．when |
By the time he ____ at the party, all the other guests ____ playing games.
| A．arrived; had begun | B．arrived; began |
| C．had arrived; began | D．had arrived; have begun |
The English language ____ the grammar and vocabulary that people from many different countries and cultures brought to Britain.
| A．is made of | B．is consisted of |
| C．is made up of | D．makes up |
Scientists observe ___ making the most of our senses when we are young can keep us healthy later on in life.
| A．if | B．what | C．that | D．When |
A lot of scientists believe that women’s sense of smell is better developed than ____ of men.
| A．one | B．it | C．this | D．that |
I heard it was going to become cloudy this afternoon, ____ by a storm.
| A．following | B．followed | C．follow | D．to follow |