You shouldn´t buy second-hand tickets online but it´s hard not to sometimes. SUPPOSED You .....second-hand tickets online but it´s hard not to sometimes.

I regret not buying a new jacket in the sale yesterday. SHOULD I ..... a new jacket in the sale yesterday.

Smoking is prohibited in most restaurants nowadays. ALLOWED You .... in most restaurants nowadays.

Students must wear a uniform at most school in the UK. COMPULSORY It´s ....a uniform at most schools in the UK.

It isn´t necessary to bring a gift if you don´t want to. HAVE You.... a gift if you don´t want to.

Thankfully, it wasn’t compulsory for him to have his photo taken. DIDN´T Thankfully, .... his photo taken.

In the end, there was no point in us bringing the extra pair of shoes. NEED In the end, ..... the extra pair of shoes.

It wasn’t necessary for me to buy a new jumper as I knew my old one still fits me. NEED ......a new jumper as my old one still fits me.

Guests should arrive at least one hour in advance to avoid long queues. ADVISABLE It´s ....... at least one hour before to avoid long queues.