Peter，shall we go for a picnic this Sunday？

OK．Let's add it to ____weekend plan．（　　）

A．aB．anC．theD．/

Sir，did you enjoy your stay in our____？

Yes，I slept well and I like the breakfast．（　　）

A．hotelB．schoolC．factoryD．company

The living room becomes ____as the sunlight comes in through the windows．（　　）

A．biggerB．cleanerC．quieterD．brighter

Sam finds sweeping robots useful，and he plans to buy _____for his grandma．（　　）

A．itB．oneC．thisD．that

Betty felt so tired last night that she ____fell asleep in bed after lying down．（　　）

A．recentlyB．suddenly

C．frequentlyD．immediately