1 . She ________ ________(学会) Spanish when she was living in Mexico.

2 . Do you think that mixed – ability classes ________ ________(阻碍进展) the better students?

3 . Born in a family with three brothers, David ________ ________ ________(养育，培养) to value the sense of sharing as a young boy.

4 . ___ not until the 1920s ___ pompoms began to play an important part in cheerleading.
直到20世纪20年代，彩线球踩在拉拉队队员的表演中发挥重要作用。

5 . As a computer engineer, there's always a new challenge just________(即将到来).（根据汉语提示完成句子）