have a difficult time

pass out; loose consciousness; desmayarse

miss; pass over

not having enough food; hambre

in the middle; part of; You are ___ friends.

past form of "teach"

person who walks in the mountiains or nature

scientist who studies insects

The area of the US- or one of the directions: North, South, East, West; Northeast, Northwest, Southeast, __.

person who is 13-19 years old

has, use, include; This problem ___ the use of trigonometry.

to study something in order to make a report. He did __ on the role of global warming.

de piel rugosa

person who studies something deeply

way, road

make public

during the same time