The researchers found clear and convincing evidence ________ happiness is the key when it comes to better health and longer lives.
| A．where | B．whether | C．how | D．that |
If our parents do everything for us children, we will not learn to depend on ________.
| A．themselves | B．them | C．us | D．ourselves |
This book is written by my sister, _________ is working for CCTV.
| A．she | B．that | C．whom | D．who |
Ladies and gentlemen, please fasten your seat belts. The plane__________.
| A．takes off | B．is taking off | C．has taken off | D．took off |
－Look! Billy is kicking________ dog.
－I hate to see anyone who kicks______ dogs.
| A．a ; / | B．the ; the | C．a ; the | D．/ ; / |
Believe it or not. My grandpa , 95 years old now, ________World WarⅡ.
| A．went across | B．passed through | C．went through | D．went by |