Theblackwriterwantedtheothermembersoftheworkshoptotreat_________asanequal.

电话是在1876年发明的。翻译

The plants need sand with a___ (deep) of at least 10 to 15 cm to grow.

People today are highly concerned about the quality of the air they___(breath).

Mary accepted Davids ___(invite)to join him for lunch.