Charles Darwin considered ______ to be theprocess by which evolution took place

Mom, must I take out the trash now–No, you , you may take a rest first .

I can’t find my mobile phone. I’m sure it’s in this room.—____________. I’ll call you with my phone. Whenit rings, you can follow the sound.

China is one of the countries ________ the Mekong River flows.

It is usually warm in my hometown in March, but it _____ be rather cold sometimes.