When you do exercises, your heart works better. It is able to______ more blood while beating more slowly.
| A．produce | B．pump | C．increase | D．bump |
Last week, only two people came to look at the house，__________ wanted to buy it.
| A．none of them | B．both of them |
| C．none of whom | D．neither of whom |
__________ you need to give all you have and try your best.
| A．Being a winner | B．To be a winner |
| C．Be a winner | D．Having been a winner |
Could I speak to __________ is in charge of International Sales please?
| A．who | B．what | C．whoever | D．whatever |
The little girl who got lost decided to remain __________ she was and waited for her mother.
| A．where | B．what | C．how | D．who |
Green is usually regarded as a __________ of life while red stands for joy and victory.
A. symbol B. sign C, mark D. signal