The child (wandered) off and got lost.
A. 游荡
B. 旅行
C. 慢跑
D. 处置
It is (estimated) that the project will last four years.
A. 提高
B. 估计
C. 商量
D. 泄露
The government has promised a full investigation into the (disaster).
A. 食谱
B. 奖金
C. 收入
D. 灾难
He was very hard-working and (dedicated) to his research.
A. 一心一意的
B. 可见的
C. 三心二意的
D. 生气的