1. 說實話，我對湯姆的學業有幾分擔心。
    ______ ______ ______, I am ______ of worried about Tom's schoolwork.
2. 如果不是水盡糧絕，我們將不會停止宿營。
    We won't stop camping ______ we ______ ______ ______ food and water.
3. 你應當把鑰匙藏在除了我倆誰也找不到的地方。
    You should ______ the keys ______ ______ ______ us two.
4. 工人們靠自己的力量最終生產出了這種主要針對國外市場的新型玩具。
    The workers ______ ______ themselves and finally produced the new type 
    of toys which mainly ______ ______ the foreign markets.
5. 即使有許多人不同意，他也會堅持自己的想法。 
    ______ ______ many people don't agree with him, he will still ______ ______ 
    to his own idea.