Poor speaker of English though he was at the time, he still managed to make himself ________.
B
非谓语动词的选用。过去分词作宾语补足语表示被动以及动作的完成。
Asforfamilyeducation,parentsareencouragedtorelyon________ratherthanpunishment.
This is ________ good reading habits are not only an important study skill for the student, but also an important life skill for anyone.
Thehousewasquietinthenight,________theoccasionalcoughingfrommythroat.
Tourist expenditures have different effects on a destination economy:sales by food vendors to restaurants are _______ effect;while taxi fares and airline ticket sales are _______ effect.