David __________ with Cathy for two years before they got married.
| A．has fallen in love | B．has been in love | C．had fallen in love | D．had been in love |
The child enjoyed _____ up the wooden bricks then knocking them down.
| A．adding | B．pushing | C．piling | D．forming |
. Mary had taken _____ to see that her guests had everything that they could possibly want.
| A．efforts | B．pains | C．attempts | D．endeavors |
Although John was the eldest in the family, he always let his sister _____ charge of the house.
| A．take | B．hold | C．make | D．get |
. It isn’t so much whether he works hard; the question is whether he works _____.
| A．above all | B．in all | C．at all | D．after all |
The island where these rare birds nest has been declared a _____.
| A．observation | B．reservation | C．preservation | D．conservation |