I like traveling by sea it is not rough.
| A．unless | B．in case | C．as long as | D．although |
Every means _________, but none proved __________.
| A．have tried; a success |
| B．have been tried; successful |
| C．has tried; to be successful |
| D．has been tried; successful |
The time and effort he has devoted during the past few years________ trees in that remote area is now considered to be of great value．
| A．to plant | B．to planting | C．plant | D．planting |
Sometimes smiles around the world _________ be false, hiding other feelings like anger, fear or worry.
| A．can | B．would | C．should | D．must |
________ life may have in store for you, each of you has a grand, lifelong project, and that is the development of yourself as a human being.
| A．However | B．Wherever |
| C．Whenever | D．Whatever |
High school is undoubtedly a time of growth, both physically and emotionally, ________ academically and socially.
| A．but | B．as well as |
| C．therefore | D．rather |