Solutions upper-intermediate unit 4 A,B,C

The bird’s _________ was sharp and left a mark on my arm.

The horses’ ________ left marks in the mud.

The polar bears' _________ is white.

[blank_start]gill[blank_end] is the ​organ through which ​fish and other ​water ​creatures ​breathe. [blank_start]fin[blank_end] is a ​thin ​vertical ​part ​sticking out of the ​body of ​especially a ​fish that ​helps ​balance and ​movement. [blank_start]claw[blank_end] is one of the ​sharp ​curved ​nails at the end of each of the ​toes of some ​animals and ​birds.

Is this definition correct? chicken out: to ​decide not to do something because you are too ​frightened

Is this definition correct? take the bull by the horn: to do things in the ​wrong ​order

Is this definition correct? let the cat out of the bag: ​warn someone that they should not ​talk about a ​bad ​situation that most ​people have ​forgotten about

Select the correct synonym. Chase=

Select the correct synonym. Hound=

Select the correct version.

Select the correct version.

Select the correct version.

Select the correct version.

Select the correct version.

Have a [blank_start]whale[blank_end] of time: have an exciting, fun time Go the whole [blank_start]hog[blank_end]: do something as completely as possible A wild [blank_start]goose[blank_end] chase: a ​search that is ​completely ​unsuccessful and a ​waste of ​time because the ​person or thing being ​searched for does not ​exist or is ​somewhere ​else Until the [blank_start]cows[blank_end] come home: for a very long time The [blank_start]rat[blank_end] race: a competitive environment

Which one is correct? A flock of...

Which one is correct? A pack of...

Which one is correct? A swarm of...